Note 11 - Revenues By Product Category And Region: Schedule Of OUS Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Sales, net (notes 1, 3, 9 and 11)	$ 11,831	$ 12,494	$ 11,846	$ 10,732	$ 9,756	$ 10,390	$ 10,965	$ 10,887	$ 10,201	$ 10,125	$ 10,829	$ 10,259	$ 46,904	$ 41,998	$ 41,414
OUS
Sales, net (notes 1, 3, 9 and 11)													19,411	20,806	21,129
OUS | Obstetrics
Sales, net (notes 1, 3, 9 and 11)													947	698	732
OUS | Gynecology/Electrosurgery/Urology
Sales, net (notes 1, 3, 9 and 11)													13,731	15,022	14,759
OUS | Neonatal
Sales, net (notes 1, 3, 9 and 11)													1,412	2,252	2,105
OUS | Blood Pressure Monitoring and Accessories
Sales, net (notes 1, 3, 9 and 11)													$ 3,321	$ 2,834	$ 3,533